James teipp



(No Model.)

J. TRIPP.

MECHANIGAL MOVEMENT.

No. 304,048. Patented Aug. 26, 1884.

lhvrirnn STATES ATEN'I @rrrcn.

JAMES TRIPP, OF.NE" YORK, N. Y.

MECHANICAL MOVEMENT.

GPECIEIUATION forming part of Letters Patent No. 30%,01-8, dated August 26, 1884:.

Application filed June 24, 1884. (X model.)

To (0% whom, may concern: rock-shaft G, as seen in Fig. 3. In the pres- Be itknown that I, JAMES TRIPP, of the city, ent case this block is preferably arranged to county, and State ofNcw York, have invented constitute one of the bearings of the rock-shaft 5 certain new and useful Improvements in Me- C, so as to give rigidity to the parts; but this 5 chanical Movements; and I do hereby declare is not essential to the construction, as this the same by the following full, clear, and eX- roclcshaft may end with its crank-arm. This act description thereof, reference being had to eccentric block carries the guide arm J, which the accompanying drawings. atits outer end is jointed to the links by the This motion is applicable to any machine pivot-pin H, that connects them. The relative I: where an angular, reciprocating, or oscillating positions of the eccentric block and driven. motion is required. It is, however, particurock-shalt O, or of the pivotal center of the larly adapted to oscillate the circularly-movguide-arm and the center of this rock-shaft are ing shuttles of sewing-machines, and I illussuch that the outer end of the guidearm will 6 5 tratc it in the accompanying drawings as 0011- be at the farthest practicable distance from r 5 structcd and proportioned for that purpose. the rock-shaft at the beginning of theoscilla- With such shuttles it is requisite that they tionthat is, just in advance of the lower shall oscillate through more than one hundred dead-centcr point of such arm or the line and eighty degrees, and it is desirable,in order through its pivotal center and the center of to best accomplish their work, that they shall the rock-shalt. 20 move through even a considerablylargerangle The action of the parts is this: As the viof oscillation than one hundred and eighty brat-ing arm ofthemain shaft rises, the guide degreesthat is, at least two hundred and arm causes the joined ends of the links to fifty-five degress, or a maximum of about two move in a circle about its pivotal center, and hundred and eighty. This invention, thereas that circle constantly approaches the circle fore, consists of an improved mechanical through which the outer end of the driven movement, whereby a circular or angular osrock-shaft crank moves, as seen in Fig. 1, it cillatory motion extending through threeis obvious that the said crank must move conquarters of a circle, and more, can be given to stantly faster, and also through a greater angle a shaft. than the guide-arm; and hence that, when the 0 Referring to the drawings, Figures 1 and 2 guide-arm has moved one hundred and eighty are side views of mechanism embodying the degrees and reached the point where its outer invention, and respectivelyillustrate the parts end is nearest the center of the driven rock in the positions that they occupy near the be-' shaft, the crank-arm of such shaft will have ginning and near the end of the range of movemoved through a much greater angle than one -5 ment, and Fig. 3 is a similar view from the hundred and eighty degrees. The extent of opposite side, Fig. 4 being a plan view of the this angular motion of the driven rock-shaft same, looking upward, and the plane 17 indiis so much dependent upon the relative size eating the sections of Figs. 1 and 2. and arrangement of the parts composing the In these drawings, A represents what I shall motion that its limits cannot be expressed for 0 term the main or driving rockshaft, to any but single constructions. However, with which the power is directly transmitted, as the mechanism from whichthe present drawthrough the medium of arm 13, or otherwise; ings are made I have produced a very free and and C is the driven rock-shaft that is to be oseven oscillatory motion of the driven rock- 9 5 cillated by the main shaft but through a much shaft through two hundred and seventy de- 5 greater are than that of the main shaft. grees and more.

D is a vibrating arm, fast to the driving-shaft. I am aware that other means than the guide- E is a crank-arm fast to the driven rock-shaft, arm's such, for instance, as a fixed camand F and G are links, one end of each of groovemay be used to control the motion of which are jointed together at H, and the other the joint between the links; but I prefer the 50 ends of which are jointed, one to the arm D, guide-arm shown, as with such construction and the other to the cranlcarm E. all the parts move about centers, and hence I is a fixed block, set eccentrically to the with great freedom and evenness of motion,

which permits of the parts being run at a very high rate of speed.

The application of this motion to drive a circularly oscillating shuttle in a sewing-machine is shown and described in an application filed May 9, 1884, of which this-is a division, and in which application due disclaimer of the herein-described matter is made by me.

\Vhat is claimed as new is 1. Asfla means for transmitting angular mo tion, the combination of a vibrating arm, a rock-shaft crank, two links jointed together, one of which is pivoted to said arm and the other to said crank, and a guide arranged to cause the joint between the links to move along a curve other than that of the rock-shaft crank-pin, for. the purpose set forth.

2. As a means for transmitting angular motion, the combination of a vibrating arm, a 20 rock-shaft crank, two links jointed together, one of which is pivoted to said arm and the other to said crank, and a guide-arm pivoted at one end to the joint between the links and at its other end to an axis arranged eccentri- 25 cally to the rock-shaft, substantially as and for the purpose set forth.

JAMES TRIPP.

Vitnesses:

J OHN BRIG-E, R. F. GAYLORD. 

